Bit-stock



(NoModel.)

, J. W. GRAY. f

' BIT STCK.

No. 571,267. Patented Nov. 10, 1896.

fan

I [Ellill liu-iran STATES PATENT rricn.

JOHN WV. GRAY, OF STILLl/VOOD, SOUTH CAROLINA.

BIT-STOCK.

SPECIFICATION forming part of Letters Fatent No. 571,267, dated November lO, 1896. Application filed April 3.18961. Serial No. 586,087. (No model.)

To all whom t man concern:

Be it known that I, JOI-IN W'. GRAY, a citizen of the United States, residing at Stillwood, in the county of Barnwell and State of South Carolina, have invented certain new and useful Improvements in Bit-Stocks; and I do n hereby declare the following to be a full, clear,

and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in bit-stocks; and it consists of the novel devices hereinafter claimed and described.

Reference is had to the accompanying drawings, wherein the same parts are indicated by the same letters throughout the several views.

Figure l is an elevation of my improved bitstock. Fig. 2 is an elevation of the same, as seen from the right in Fig. l. Fig. 3 is a longitudinal section taken on theline 3 3 of Fig. 1, and Fig. 4 is a perspective view of the stock itself with the bit-operating devices removed.

The body of my bit-stock is composed of the two sections A and A2, the section A having the beveled overhanging lug a", fitting into the inclined slot d4 between the shoulders a3 a3 on the section A2, and the two sections held together by means Of screws s. The section A has an extension A' at one end, forming a hand-grip, which terminates in a knob or rest d. The two sections A and A2 are provided with semicylindrical extensions aand d2, respectively,which extensions, when the two sections are fitted together, combine to form the cylindrical shank A3, as shown in Figs. l and 2.

A longitudinal slot A00 and a transverse slot A0, opening into each other, are formed through both sections A and A2, so that when the tWo sections are iitted together the slots in each will coincide. The large bevel-gear E is mounted in the slot A00 rigidly upon the shaft C, which shaft is journaled in bearings provided in the adjacent faces of the two sections of the body of the stock. The outer end of the shaft C is squared, as at 0X, anda hand-crank C' is mounted upon this squared end for rotating the shaft. Each of the semicylindrical extensions a and d2 has a longitudinal semicylindrical groove, as shown at a" and am), which combine to form. a cylindrical opening when the two sections are fitted together. This cylindrical opening in the shank AE leads from the outer end of the said shank to the transverse slot A0 in the stock, and in this opening the chuck-spindle B fits and is adapted to rotate. The inner end of this chuck-spindle B terminates in a reduced portion b, fitting in journal-bearings in the adjacent faces ot' the sections A and A2. The chuck-spindle B is also provided With a squared portion BX, which crosses the transverse slot A, and upon which squared portion and in which slot the beveled pinion D is rigidly mounted.

The beveled pinion D meshes with the tensions d and d2 forming the shank A3 are o held irmly together by means of an internally-screW-threaded band or collar F, which engages corresponding screw-threads on the ends of the parts a and a2, and when screwed thereon binds the two halvesof the shank firmly together. The periphery of the band or collar F should be milled, as shown, to render it easier to turn.

The outer end of the spindle B carries the chuck H for holding the bit X. This chuck may be of any suitable construction, and I do not Wish to limit myself to the use of the exact form of bit-holdin g chuck herein shown.

The operation of my device is too evident to need any explanation.

It will be seen that my stock maybe readily taken apart and put together when that be desired for any reason.

I -Iaving thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. In a bit-stock, the combination with a body or frame composed of two superposed members the one having a beveled overhanging lug engaging in a correspondingly-beveled slot in the other, each having a plurality of semicylindrical grooves in its inner face coincident With similar grooves in the other member, and each having a longitudinal slot and a transverse slot communicating with each other formedY coincident With similar slots in the other member; a shaft journaled IOO in one set of said grooves in said members across said longitudinal slot, a bevel-gear rigidly mounted upon said shaft and a crank mounted upon said shaft for turning same; a chuck-spindle journaled in another set of grooves in said members with its inner end across said transverse slot, a pinion rigidly mounted upon said chuck-spindle in said transverse slot and meshing with said bevelgear; means for holding the two members together, and means for attaching the bit to said chuck spindle, substantially as described.

2. In a bit-stock, the combination with a body or frame composed of two superposed members the one having a beveled overhanging lug engaging in a correspondingly-beveled slot in the end of the other, and the former having a hand-grip thereon; each having a plurality of semicylindrical grooves coincident with similar grooves in the opposite member, and each having a longitudinal slot and a transverse slot communicating with each other formed coincident with similar slots in the other member; a chuck-spindle journaled in one set of grooves in said body; a bevelpinion rigidly mounted upon said ch Lick-spindle in said transverse slot; a bevel gear mounted in said longitudinal slot upon a shaft journaled in another set of grooves; a crank mounted upon said shaft for rotating same; means for holding said members together, and means for attaching the bit to said chuckspindle, substantially as described.

3. In a bit-stock, the combination with a body or frame composed of two superposed members the one having a hand-grip formed thereon, and a beveled overhanging lug engaging in a correspondingly-beveled slot in the end of the other; each having an extension at the opposite end from s'aid hand-grip having a semicylindrical groove longitudinally thereof, and each having a longitudinal slot and a transverse slot in communication with the other; a chuck-spindle journaled in the seinicylindrical grooves in said extensions7 and crossing said transverse slot; a bevelpinion rigidly mounted upon said chuckspindle in said slot; a bevel-gear meshing with said pinion mounted in said longitudinal slot upon a shaft journaled in said frame; a crank mounted upon said shaft; means for holding said members together and means for attaching the bit to said chuck-spindie, substantially as described 4. In a bit-stock, the combination with a body or frame composed of two superposed members the one having a hand-grip formed thereon, and a beveled overhanging lug engaging in a correspondingly-beveled slot in the end of the other; each having an extension at the opposite end from said hand-grip provided Witha semicylindrical groove longitudinally thereof, and each having a longitudinal slot anda transverse slot in communication with each other; a chuck-spindle journaled in said extensions and crossing said transverse slot; a bevel-pinion rigidly mounted upon said spindle in said slot; a bevelgear meshing with said pinion mounted in said longitudinal slot upon a shaft journaled in said frame; a crank mounted upon said shaft; screws passing through the said members and binding the same together; an internally-screw-threaded collar or band engaging upon screw-threads upon the ends of said extensions; and means for attaching the bit to said chuck-spindle, substantiallyT as described.

5. In a bit-stock, the combination with a body or frame composed of two superposed members the one having a hand-grip formed thereon, and a beveled overhanging lug engaging in a correspondingly-beveled slot in the end of the other; each having an extension at the opposite end from said hand-grip provided with a semicylindrical groove lon gitudinally thereof, a chuck-spindle journaled in said extensions; a bevel-pinion rigidly mounted upon said spindle in a slot in said frame; a bevel-gear meshing with said pinion mounted in a slot in said frame at right angles to said pinion, upon a shaft journaled in said frame; a crank mounted upon said shaft; screws binding said members together; an internally-screw-threaded collar or band engaging upon screw-threads upon the ends of said extensions; and a chuck for holding the bit, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN W. GRAY. Witnesses:

J. D. GRAY, IIENRY COBB.

IOO 

